Boiler-furnace.



PATENTED JUNE 23, 1908..

D. TAGGAR'L- BDILER- FURNACE. APPLICATION FILED 8PT.20,-1907.

60 a a; 77 g 3 f b o- 3 0 &

INVENTOR.

WITNESSES: 2

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, DANIEL TAGGAR'IP, OF INDIANAPOLIS, INDIANA.

BOILER-FURNACE Specification of Letters Patent.

Patented June 23, 1908.

Applicationfiled September 20, 1907. Serial No. 393,755.

To all whom it may concern:

Be it known that I, DANIEL TAGGART, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Boiler Furnaces; and I do declare the following to be a full, clear, and exact description of the invention, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to furnacesin which it is designed to consume fuel for the purpose ofutilizing the heat of combustion, and the invention has reference more particularly to boiler furnaces, the object of the invention being to provide an improved construction in furnaces to the end that economy in the consumption of fuel may be attained, and that the smoke nuisance in a measure be eliminated by preventing the emission of the products of imperfect combustion from the furnaces.

The invention consists in an improved furnace comprising a combustion chamber having grate-bars in a relatively small portion of thefloor thereof, and a relatively small draft passage in a wall of the combustion chamber remote from the grates; and the invention consists further in the novel construction, and the parts and combinations and arrangements of parts as hereinafter particularly described and defined in the appended claims.

. Referring to the drawings, in which similar reference characters designate like elements or features of construction, Figure 1 is a side elevation of an improved boiler furnace constructed substantially in accordance with the invention, a portion of the furnace wall being broken away and exposing a boiler mounted therein; 2, a horizontal sectional view approximately on the line A A in Fig. 1; Fig. 3, a transverse sectional view approximately on the line B B in Fig. 1, looking rearward; and Fig. 4, a transverse sectional view on the line C C in Fig. 1, looking forward; the line D D in Fig. 3 indicating approximately the plane on which sectional portions of Fig. 1 appear. In constructing the improved furnace, the

walls thereof may be variously arranged and the heat from the furnace may be utilized in various ways, some cases it being desirable to construct an artificial roof for the furnace, but in the present case and when the furnace is constructed for heating boilers, the boiler conveniently serves as the roof for the combustion chamber while permitting of the application of the heat directly to the boiler. Of course it will be understood that various types of boilers may be used with the improved furnace;

' In the drawings a and a designate the two side walls of the furnace; b, the front wall; and b the metallic boiler front; and c, the rear wall of the furnace. A boiler (1 having a steam dome d is mounted on the front wall between the side walls and extends rearward nearly to the rear wall 0 and has a smoke box a on which is a chimney f. The boiler is of suitable diameter so as to extend across from either side wall to the other one, and is arranged at a suitable height so as to afiord space beneath the boiler for the combustion chamber and heat passages.

The combustion chamber, formed partially by the side walls and the front Wall, has a flat floor g extending from one side Wall to the other one, and from the front wall rearward relatively a long distance toward the rear end of the boiler and at a suitable distance below the boiler, the floor being preferably composed of fire bricks and suitably supported as by earth, and in one portion of the floor is an opening g adjacent to and the front wall has a fire door frame j in one end thereof so as to be directly in front of the group of grate-bars, a fire door 70 being mounted on the door frame. A suitable number of air ducts Z are arranged in the front'wall between the door frame and the opposite end of the front wall, so that the atmospheric air may enter the combustion chamber over the portion of the floor at one side of the firegrates. The front wall is provided with an ash pit door m.

A partition wall n is constructed at the rear end of the floor 9 and extends from either side wall a or a to the other side wall and up to the boiler, and it has a draft passage 0 therein near the side wall adjacent to which the grate-bars are arranged and near the plane of the top of the floor the draft passage being rearward of and remote from the grate-bars. A deflector p is preferably arranged at a suitable distance from and opposite to the draft passage 0 at the rear of the wall n and extends a suitable distance from the adjacent side wall inward and'up to the boiler for deflecting the heat towards the opposite side wall a, there being a chamber or passa e Q extending from the wall n to the rear wafi c of suitable depth for conveying the heat and gases of combustion under the rear end of the boiler and up to the boiler tubes or flues.

It will be understood that while it is designed to burn coal or wood, or coke, preferably bituminous coal, on the fire grates and that the fire grates may be suitably modified to suit the fuel, it is clear that oil orga's may be used as fuel if desired, and suitable modifications will be made with respect to admitting air through or between the fire grates and through the air ducts Z to suit the characteristics of the fuel.

In practical use the fuel will be ignited on or immediately above the grate-bars i and the heat generated together with the chimney draft will cause the partially i nited carbon or gases of combustion to whir or gyrate through the s ace in the combustion chamber towards al portions thereof away from the grate-bars, particularly towards the side wall 0 posite to which the rate-bars are arrangec and to the front wall b, and also rearward and upward towards the boiler, the

' atmospheric air entering the air ducts providing oxygen which'mixes with the gases,

so as to make perfect combustion possible, the result being intense heat confined by the surrounding chamber walls, so thatthe heat will be in large volume immediately beneath the boiler, while the passage 0 will permit the heat to escape into the chamber q for heating the rear portion of the boiler and thence pass through the draft passages of the boiler towards the smoke box 6. It will be seen that the passage 0 is proportioned relatively to the area of the fire grates, so that the draft passage will carry away conveniently the gases or fumes resulting from the burning of the fuel while the large area of the combustion chamber beyond the fire rates will at all times contain a relatively arge volume of burning gases which will thoroughly consume all the combustible matter derived from the fuel, with ample time for consumption of the products of combustion, and therefore the highest results will be attained.

Having thus described the invention, what is claimed as new is 1. A furnace comprising two opposite side walls, a front wall with a fire-door, a substantially flat floor extending from the front wall and from one to the other of the side walls and having a relatively small draft opening therein remote from one of the side walls and adjacent to the front wall and the opposite side wall, a rear wall at the rear end of the floor and opposite to the front wall and extending from one to the other of the side walls with a roof joined to all the walls, the

rear wall having a draft passage therein adjacent to the floor and one of the side walls and remote from the other side wall and the roof.

2. A boiler furnace comprising a front wall, two opposite side walls joined to the front wall, the front wall having a door adjacent to one and remote from the other one of the side walls, a rear wall joined to the side walls, a boiler extending from the front wall nearly to the rear wall and joined to the side walls, a substantially flat floor extending from the front wall rearward and from one to the other of the side walls below the boiler and having a relatively small opening therein remote from one of the side walls and adjacent to the opposite side wall and the door of the front wall, grate-bars extending across the opening, and a partition wall at the rear end of the floor and extending therefrom up to the boiler and from one to the other side wall, the partition wall havinga draft passage therein adjacent to the floor and also to the side wall that is adjacent to the opening of the floor, the passage being remote from the o posite side wall and the boiler.

3. Aboifer furnace comprising a front wall, two side walls joined to the front wall, the front wall having a door adjacent to one and remote from the other one of the side walls and having also air-ducts therein adjacent to the said last-mentioned side wall, a rear wall joined to the side walls, a boiler extending from the front wall nearly to the rear wall and joined to the side walls, a floor extending from the front wall rearward and from one to the other of the side walls below the boiler and having an o enin therein remote from one of the sidewalls and adjacent to the opposite side wall and the door of the front wall, grate-bars extending across the opening, a partition wall at the rear end of the floor and extending therefrom up to the boiler and from one to the other side wall, the partition wall having a draft passage therein adjacent to the floor and also to the side wall that is adjacent to the opening of the floor, the In testimony whereofll affix my signature pasfiagedbiin% rfimote (lg-{r0131 E16 opposite CTide in presence of two Witnesses. wa an t e 0' er,an a, e eetor eXten in from the side Well that is ad'acent to th% DANIEL TAGGART' 5 opening of the floor past the draftpassage Witnesses:

towards the opposite side Wall and up to- WM. H. PAYNE, Wards the boiler. E. T. SILvIUs. 

